This is just a simple projection. I'll provide a little CAD draft I did to explain what that means:
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As time consuming as this may be, at the end I get a true projection. Yes, I measured out each and every plank of wood on this deck just so I could later fill in with black. Sounds counterproductive but the finished product gives a certain amount of textured feel rather than having a flat color. I don't always use a ruler but when I do I draw projections (and really I didn't use a ruler at all it was the edge of a business card).
So, after all that, which wasn't much. My opinion of this, "Eh." Again I would have preferred my smudgers to my fingers and graphite to a single #2.